Update readme.md
Update readme.md
Several fixes for building on Linux.
Fix when switching back from slides

The camera would remain locked when switching to nodes or rooms from
slides.
Incremented version number.

Also fixed a minor problem in the Xcode post-build script.
Added the 'dagon' namespace to all classes.

Also eliminated all "using namespace std" sentences.
Ensured consistent define guards.
Direct control now working properly!
Incremented version number.
Fix for Visual Studio.

A header was incorrectly being included in the 'dagon' namespace, so VC
complained.
kEpsilon was added to avoid the loss of precision.

From pull #73, contributed by Alexander Alekseev.
Increased performance. Replaced iterator++ with ++iterator.

From pull #73, contributed by Alexander Alekseev.
Geometry functions added.

Inspired by NSGeometry by Apple. Also changed _centerOfPolygon method.
It is smaller and (maybe)
faster now.

From pull #73, contributed by Alexander Alekseev.
Some optimizations.

From pull #73, contributed by Alexander Alekseev.
New geometry and optimizations.

From pull #73, contributed by Alexander Alekseev.
New geometry functions.

MakeVector was added.
Comments for geometry functions were added.
From pull #73, contributed by Alexander Alekseev.
New functions + code optimization.

Functions DGMakeCursorData, DGMakeGlyph, DGMakeLogData,
setValuesInLookUpTable were added.
Code optimization.
From pull #73, contributed by Alexander Alekseev.
Minor fixes.

From pull #73, contributed by Alexander Alekseev.
Improvements to the YUV to RGB conversion.

It's quite more precise now.